//1.使用commonjs的模块化规范
const { add, mul } = require("./mathUtil.js");
console.log(add(20, 30));
console.log(mul(30, 20));

//2.使用ES6的模块化的规范
import { name, age, height } from "./info.js";
console.log(name);
console.log(age);
console.log(height);
